- BIFF 2-12 formula parsing
- more content type coverage
- unified `.f` form: A1-style string
- `.F` field for array formulae
- formula output groups array formulae
- bin script -A --arrays output JS row objects
- whitespace robustness in inline string xml
- UTF-8 parsing in rich text runs (fixes #505 h/t @fuchsc)
- bold/italic/underline accept null val attr (h/t @qqilihq)
- sst trimming (fixes #176 h/t @shakhal @oising)

- basic support for parsing BIFF2-4
- basic support for writing BIFF2
- cleaned up some bad substr uses for IE6 compatibility
- added flow type annotations for xlsx.flow.js
- added numerous null guards (fixes #255 h/t @martinheidegger)
- README cleanup (fixes #539 h/t @oliversalzburg)
- pin jszip to local version (closes #408 h/t @limouri)

bower issues:

|  id  | author            | comment                                   |
|-----:|:------------------|:------------------------------------------|
| #254 | @kkirsche         | fixes #254 by removing version from json  |
| #165 | @vincentcialdella | fixes #165 by changing default script     |
| #180 | @owencraig        | fixes #180 by using xlsx.core.min.js      |

format issues:

|  id  | author            | comment                                   |
|-----:|:------------------|:------------------------------------------|
| #271 | @morstaine        | fixes #271 by reworking related parse fns |
| #504 | @JanSchuermannPH  | fixes #504 detect FullPaths h/t @Mithgol  |
| #508 | @basma-emad       | fixes #508 offending file used `x:` NS    |

- README and example cleanup
- basic XLSB and ODS write support
- flow typecheck for ODS file
  Note: xlsx.js flow fails: https://github.com/facebook/flow/issues/380
- exposed jszip compression (fixes #220, closes #284)

README issues:

|  id  | author         | comment                                      |
|-----:|:---------------|:---------------------------------------------|
| #202 | @sao93859      | closes #202                                  |
| #211 | @alexanderchan | closes #211 corrected examples               |
| #327 | @cskaandorp    | changed saveAs example to match write tests  |
| #424 | @dskrvk        | added note about s2roa h/t @LeonardoPatignio |
| #496 | @jimmywarting  | closes #496 adapted rABS examples with rAAS  |

ODS file format issues:

|  id  | author         | comment                                      |
|-----:|:---------------|:---------------------------------------------|
| #148 | @user4815162342| closes #148 h/t @ziacik                      |
| #166 | @paulproteus   | closes #166 rudimentary ODS write support    |
| #177 | @ziacik        | closes #177                                  |
| #179 | @ziacik        | closes #179 use JSON when available          |
| #317 | @ziacik        | closes #317                                  |
| #328 | @think01       | closes #328                                  |
| #383 | @mdamt         | closes #383 duplicate cells should be copied |
| #430 | @RB-Lab        | closes #430                                  |
| #546 | @lgodard       | closes #546 thanks to other changes          |